A method for image processing and distance measuring based on laser distance triangulation

Barreto, Saulo Vinicius Ferreira; Sant'Anna, Remy Eskinazi; Feitosa, Marcílio André Félix

doi:10.1109/icecs.2013.6815509

Cited by 16 publications

(9 citation statements)

References 4 publications

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“…It is observed that near-zero step error could happen possibly as a result of phasefolding or phase-bluring under the influences of frequency drift, noise and atmospheric refraction [6]. Barreto et al applied triangulation laser ranging method but its sensitivity requirement is stringent and power consumption is high [7]. In this paper, a miniature, and portable and low power consumption laser ranging system has been developed with two modes of measurement: a high accuracy mode and a longdistance mode.…”

Section: Introductionmentioning

confidence: 99%

High Precision Laser Ranging Based on STM32 Microcontroller

Marsh

Hou

2020

2020 International Conference on UK-China Emerging Technologies (UCET)

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A miniature portable laser ranging system based on an STM32 microcontroller and VL53L0X time-of-flight laser ranging sensor was developed. An LCD display indicates the real time measured range value. Two working modes with different accuracy and detectable range were designed. These comprise high accuracy and long-distance modes which make the equipment very versatile for real applications. Following code optimization and verification by calipers, the relative measurement error is around 1%-2% for both modes.

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Section: Introductionmentioning

confidence: 99%

High Precision Laser Ranging Based on STM32 Microcontroller

Marsh

Hou

2020

2020 International Conference on UK-China Emerging Technologies (UCET)

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“…Barreto et al proposed a method to measure a distance based on laser distance triangulation for image processing [9]. He developed a measurement technique on an embedded system which required smaller processing power compared to personal computer as x86 architecture.…”

Section: Related Workmentioning

confidence: 99%

Fast Obstacle Distance Estimation using Laser Line Imaging Technique for Smart Wheelchair

Utaminingrum

Fitriyah

Wihandika

et al. 2016

IJECE

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This paper presents an approach of obstacle distance estimation for smart wheelchair. A smart wheelchair was equipped with a camera and a laser line. The camera was used to capture an image from the environment in order to sense the pathway condition. The laser line was used in combination with camera to recognize an obstacle in the pathway based on the shape of laser line image in certain angle. A blob method detection was then applied on the laser line image to separate and recognize the pattern of the detected obstacles. The laser line projector and camera which was mounted in fixed-certain position ensured a fixed relation between blobs-gap and obstacle-to-wheelchair distance. A simple linear regression from 16 obtained data was used to respresent this relation as the estimated obstacle distance. As a result, the average error between the estimation and the actual distance was 1.25 cm from 7 data testing experiments. Therefore, the experiment results show that the proposed method was able to estimate the distance between wheelchair and the obstacle.

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“…The laser source beam projected on a surface has a certain rayon when observed with a camera [ 9 , 10 , 11 , 12 ]. In laser triangulation, the laser spot projected on a surface behaves as the reference [ 13 ]. The angle created between the camera, reference and the laser allows distance measurement using triangulation principle.…”

Section: Introductionmentioning

confidence: 99%

A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation

Selami

Tao

Gao

et al. 2018

Sensors

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Abstract:Laser triangulation allows non-contact measurement in the third dimension. Due to the nonlinearities presented in camera and laser sensor, large range distances are quite difficult to measure with high precision. In order to enhance the precision and accuracy of large range measurement based on laser triangulation, we propose a novel scheme composed of four laser emitters, curve fitting subpixel location algorithm for laser center detection, and the linear regression approach based on the Gaussian model for calibration. When an object performs a 100 mm displacement from a closer to a farther point, our system achieved a repeatability up to ±7 µm, an estimated standard deviation of fitting error within 0.0027 mm, an expanded uncertainty of repeatability within 0.13 mm, an average error variation of rotational plane within 0.15 degree and a nonlinearity error within ±0.04% in full scale. Compared to published results, our proposed method shows an enhancement in accuracy. The error is significantly reduced and maintains at the low level for large ranges, which makes this system applicable and suitable for industrial and indoor applications.

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A method for image processing and distance measuring based on laser distance triangulation

Cited by 16 publications

References 4 publications

High Precision Laser Ranging Based on STM32 Microcontroller

High Precision Laser Ranging Based on STM32 Microcontroller

Fast Obstacle Distance Estimation using Laser Line Imaging Technique for Smart Wheelchair

A Scheme for Enhancing Precision in 3-Dimensional Positioning for Non-Contact Measurement Systems Based on Laser Triangulation

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